Racer / racing bicycle Phone Mount Galaxy j5

As I am an ambitioned racing bicycle user, I tend to drive long distances to get from one point to another. I listen to music and sometimes I need Google Maps to find my destination.
The problem wes, sometimes, my pockets were to small for my not even really big phone, so I wanted to challenge myself with this project.
I figured out, for almost all racing bikes, the middle of the handle bar, right at the shaft, you can find 3 potential spots to mount a bracket that can give a safe fix to a ph